CLAS physics database search results Measurement E159M320 E1-6 V. Burkert 2001 theta(p) dsigma/d(−cos(theta_pr)) Data errors deg mcb/rad mcb/rad 9 1.22234 0.357808 27 1.49417 0.260661 45 1.49823 0.244776 63 1.92281 0.322639 81 2.63608 0.414739 99 3.21004 0.50727 117 3.32386 0.485097 135 3.18602 0.50217 153 2.66354 0.452853 171 2.1244 0.460576